Allen-Bradley 1756-IF8I ControlLogix analog input module

The Allen-Bradley 1756-IF8I is a ControlLogix analog input module that features Eight (8) individually isolated analog input channels. It is designed to receive Current and Voltage signals ranging ±10.5V, 0 -10.5V, 0-5V and 0-20 mA. It has a very high conversion resolution of 24-Bits, which makes this module compatible for application that require high-accuracy readings. with resolution of 16 bits.

Each channel of the module is provided with overvoltage protection, short circuit detection, module Temperature range error, data alarming such as ramp rate, process alarms and other module diagnostic features.

The 24-Bit resolution of this modules provides an actual resolution of 1.49 ?V/count for +/- 10.5 VDC, 0 - 10.5VDC and 0-5.25 VDC for Voltage input while for Current input, the actual resolution for 0-21 mA signal is 2.99 nA/count. This resolution is not the standard resolution of any analog module as typical resolution of standard analog input are 13-16 Bit resolutions only.

The terminated Analog signals enables interface to actual process variables. This is necessary for the Programmable Logic Controller (PLC) to monitor or control a process by allowing integration to computer based control systems, such as a Human Machine Interface (HMI), Supervisory Control and Data Acquisition (SCADA) and Distributed Control Systems (DCS).

Technical specifications for 1756-IF8I

ManufacturerRockwell Automation

BrandAllen-Bradley

Part Number/Catalog No.1756-IF8I

SeriesControlLogix

Channels8 Isolated Channels

Module TypeAnalog Input

I-O Ranges0-10 Volts

Inputs8-Points, Isolated , Any combination of Voltage or Current mode

Conversion MethodSigma-Delta

Current Draw (5.1 Volts)200 milliamps

Data formatIEEE 32-bit floating point

Current Draw (24 Volts)150 or 400 milliamps

Input signal Range-10…10V 0…10V 0…5V 0…20 mA

Input Resolution24 bits; ±10.5V (1.49 ?V/count) 0…10.5V (1.49 ?V/count) 0…5.25V (1.49 ?V/count) 0…21 mA (2.99 nA/count)

Resolution16-21 bits

EnclosureOpen

Backplane Current (5Volts)200 mA

Backplane Current (24Volts)Voltage/Non-sourcing Current mode: 150 mA Sourcing Current mode: 400 mA (In Sourcing Current mode, the channel provides loop power.)

Power Dissipation (Max)Voltage mode: 4.6 W Non-sourcing Current mode: 5.1 W Sourcing Current mode: 7.3 W

Removeable Terminal Blocks1756-TBNH, 1756-TBS6H